// Copyright 2011 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util.frameEngine
{
	public class FrameSegmentCollection extends FrameSegment implements IFrameSegment
	{
		public function FrameSegmentCollection()
		{
			super();
			// Sub-classes should set up _afsgs and then call CalculateLength()
		}
		
		public function get isCurved():Boolean {
			return false;
		}

		protected var _afsgs:Array = null;
		
		protected function CalculateLength(): void {
			_nLength = 0;
			for each (var fsg:FrameSegment in _afsgs)
				_nLength += fsg.length;
		}
		
		override public function GetLoc(nDistance:Number):FrameSegmentLoc
		{
			if (nDistance < 0)
				nDistance = 0;
			else if (nDistance > _nLength)
				nDistance = _nLength;
				
			var i:Number = 0;
			while (nDistance > FrameSegment(_afsgs[i]).length) {
				nDistance -= FrameSegment(_afsgs[i]).length;
				i += 1;
			}
			return FrameSegment(_afsgs[i]).GetLoc(nDistance);
		}
	}
}